@lauren I don't know when I'll carve out time to follow this case more closely, but it's worth a follow.
Word on the street is the new chair of the FTC has some new ideas on what "monopoly" should mean and has floated some heavy-target test cases to test the law here. If they succeed, they could change the definition of "monopoly" in American law.
(The details of those theories is the part I haven't made time to research).